JEE Mains · Chemistry · STD 12 - 10. Biomolecules
Consider the following reactions. Total number of electrons in the \(\pi\) bonds and lone pair of electrons in the product \((X)\) is :

- A \(12\)
- B \(16\)
- C \(14\)
- D \(18\)
Answer & Solution
Correct Answer
(D) \(18\)
Step-by-step Solution
Detailed explanation
Step 1: The starting material is an aldohexose (like D-glucose). On prolonged heating with \(HI\), it undergoes reduction to form n-hexane. This indicates that all six carbon atoms are linked in a straight chain.…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- Given,
(A) \(n =5, m_1=-1\)
(B) \(n =3,1=2, m_1=-1, m_{ s }=+\frac{1}{2}\)
The maximum number of electron(s) in an atom that can have the quantum numbers as given in (A) and (B) respectively are :JEE Mains 2026 Medium - The most common oxidation state of Lanthanoid elements is \(+3\). Which of the following is likely to deviate easily from \(+3\) oxidation state?JEE Mains 2022 Easy
- Consider \(A \xrightarrow{ k _1} B\) and \(C \xrightarrow{ k _2} D\) are two reactions. If the rate constant \(\left( k _1\right)\) of the \(A \rightarrow B\) reaction can be expressed by the following equation \(\log _{10} k =14.34-\frac{1.5 \times 10^4}{T / K }\) and activation energy of \(C \rightarrow D\) reaction ( \(Ea _2\) ) is \(\frac{1}{5}\) th of the \(A \rightarrow B\) reaction \(\left( Ea _1\right)\), then the value of \(\left( Ea _2\right)\) is _______ \(kJ~mol ^{-1}\). (Nearest Integer)JEE Mains 2026 Easy
- Potassium chlorate is prepared by electrolysis of \(\mathrm{KCl}\) in basic solution as shown by following equation. \(6 \mathrm{OH}^{-}+\mathrm{Cl}^{-} \rightarrow \mathrm{ClO}_{3}^{-}+3 \mathrm{H}_{2} \mathrm{O}+6 \mathrm{e}^{-}\) A current of \(x A\) has to be passed for \(10 h\) to produce \(10.0 \mathrm{~g}\) of potassium chlorate. The value of \(\mathrm{x}\) is \(.......\) (Nearest integer) (Molar mass of \(\left.\mathrm{KClO}_{3}=122.6 \mathrm{~g} \mathrm{~mol}^{-1}, \mathrm{~F}=96500 \mathrm{C}\right)\)JEE Mains 2021 Hard
- On a thin layer chromatographic plate, an organic compound moved by \(3.5 \mathrm{~cm}\), while the solvent moved by \(5 \mathrm{~cm}\). The retardation factor of the organic compound is _______ \(\times 10^{-1}\)JEE Mains 2024 Hard
- \(R_f\) value for \(2\)-methylpropene in a solvent system (Ethyl acetate + ether) is \(0.42\). \(2\)-methylpropene is treated with dilute \(\text{H}_2\text{SO}_4\) to give major organic product (X). \(R_f\) value for (X) in the same solvent system under identical condition will be:JEE Mains 2026 Hard
More PYQs from JEE Mains
- Let the mean and variance of \(8\) numbers \(x , y , 10\), \(12,6,12,4,8\), be \(9\) and \(9.25\) respectively. If \(x > y\), then \(3 x-2 y\) is equal to \(...........\).JEE Mains 2023 Hard
- The number of bridged oxygen atoms present in compound \(B\) formed from the following reactions is \(Pb \left( NO _{3}\right)_{2} \stackrel{673 K }{\longrightarrow} A + PbO + O _{2}\) \(A \stackrel{\text { Dimerise }}{\longrightarrow} B\)JEE Mains 2022 Easy
- If \(\mathrm{y}(\alpha)=\sqrt{2\left(\frac{\tan \alpha+\cot \alpha}{1+\tan ^{2} \alpha}\right)+\frac{1}{\sin ^{2} \alpha}}, \alpha \in\left(\frac{3 \pi}{4}, \pi\right)\) then \(\frac{d y}{d \alpha}\) at \(\alpha=\frac{5 \pi}{6}\) isJEE Mains 2020 Hard
- Two particles having masses \(4\, g\) and \(16\, g\) respectively are moving with equal kinetic energies. The ratio of the magnitudes of their linear momentum is \(n : 2 .\) The value of \(n\) will be ...... .JEE Mains 2021 Medium
- The de Broglie wavelengths of a proton and an \(\alpha\) particle are \(\lambda\) and \(2 \lambda\) respectively. The ratio of the velocities of proton and \(\alpha\) particle will be _______.JEE Mains 2024 Hard
- The value of \(\left(2 .{ }^{1} P _{0}-3 .{ }^{2} P _{1}+4 .{ }^{3} P _{2}-\ldots .\right.\) up to \(51\) th term)+\(\left(1 !-2 !+3 !-\ldots . .\right.\) up to \(51^{\text {th }}\) term \()\) is equal toJEE Mains 2020 Medium